On S3 (Supp) the names and class cells only allow 25 characters. How to overide to type in full names of companies and share class?

The 'Name of fund/corporation and class of shares' column on the S3 (Supp) form only accepts 25 characters even though the EasyStep data entry panel accepts far more.  How can I override the 25 character limit on this form.  The CRA will want the full name, not a truncated one.